[Flight] Forward early debug info for lazy chunks

[lubieowoce]

Currently, when we're re-encoding a lazy chunk that came from a flight stream, we wait for the chunk to resolve, and then forward the debug info. This unnecessarily delays debug info that's already available while the chunk is still pending, like the name and stack info. This PR attempts to make it so that we emit whatever debug info we have before initializing the lazy chunk (which may suspend), and then emit the rest after.

When a debug info array is partially emitted, we save the number of emitted entries we already emitted in a WeakMap request.partialDebugInfoProgress. That way, when we emit it again later, we know how many entries to skip.

Most debug infos are not partially emitted -- we currently only do this for lazy elements -- so to avoid the overhead of tracking the index for each debug info array, we only do this if it's emitted usingforwardDebugInfoProgressive.

Notably, we also need to handle cases when debug entries are transferred from the lazy chunk onto the inner element (i.e. moved to a different array) via moveDebugInfoFromChunkToInnerValue:

react/packages/react-client/src/ReactFlightClient.js

Lines 1275 to 1291 in b546603

	// If the lazy node is initialized, we move its debug info to the inner
	// value.
	if (lazyNode._payload.status === INITIALIZED && lazyNode._debugInfo) {
	const debugInfo = lazyNode._debugInfo.splice(0);
	if (element._debugInfo) {
	// $FlowFixMe[method-unbinding]
	element._debugInfo.unshift.apply(element._debugInfo, debugInfo);
	} else {
	Object.defineProperty(element, '_debugInfo', {
	configurable: false,
	enumerable: false,
	writable: true,
	value: debugInfo,
	});
	}
	}
	}

In this case, we have to make sure that new array has the same progress as the source. We do this in copyDebugInfoProgressToResolvedValue.

[react-sizebot]

Comparing: da64117...4550479

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
oss-stable/react-dom/cjs/react-dom.production.js	=	6.84 kB	6.84 kB	+0.05%	1.88 kB	1.88 kB
oss-stable/react-dom/cjs/react-dom-client.production.js	=	609.58 kB	609.58 kB	=	107.80 kB	107.80 kB
oss-experimental/react-dom/cjs/react-dom.production.js	=	6.84 kB	6.84 kB	=	1.88 kB	1.88 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js	=	675.51 kB	675.51 kB	=	118.75 kB	118.75 kB
facebook-www/ReactDOM-prod.classic.js	=	695.14 kB	695.14 kB	=	122.19 kB	122.19 kB
facebook-www/ReactDOM-prod.modern.js	=	685.52 kB	685.52 kB	=	120.59 kB	120.59 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
oss-stable-semver/react-server/cjs/react-server-flight.development.js	+1.38%	144.05 kB	146.03 kB	+1.43%	25.73 kB	26.10 kB
oss-stable/react-server/cjs/react-server-flight.development.js	+1.38%	144.05 kB	146.03 kB	+1.43%	25.73 kB	26.10 kB
oss-experimental/react-server/cjs/react-server-flight.development.js	+1.36%	146.14 kB	148.12 kB	+1.43%	26.19 kB	26.56 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-server.browser.development.js	+0.97%	205.08 kB	207.06 kB	+0.99%	36.99 kB	37.36 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-server.browser.development.js	+0.97%	205.08 kB	207.06 kB	+0.99%	36.99 kB	37.36 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-server.browser.development.js	+0.96%	207.18 kB	209.16 kB	+0.95%	37.43 kB	37.79 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-server.edge.development.js	+0.95%	208.77 kB	210.75 kB	+0.96%	37.51 kB	37.87 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-server.edge.development.js	+0.95%	208.77 kB	210.75 kB	+0.96%	37.51 kB	37.87 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-server.edge.development.js	+0.94%	210.86 kB	212.84 kB	+0.89%	37.94 kB	38.28 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-server.browser.development.js	+0.93%	212.86 kB	214.84 kB	+0.93%	38.30 kB	38.66 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-server.browser.development.js	+0.93%	212.86 kB	214.84 kB	+0.93%	38.30 kB	38.66 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-server.browser.development.js	+0.93%	213.34 kB	215.32 kB	+0.92%	38.41 kB	38.76 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-server.browser.development.js	+0.93%	213.34 kB	215.32 kB	+0.92%	38.41 kB	38.76 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-server.browser.development.js	+0.92%	214.97 kB	216.95 kB	+0.88%	38.75 kB	39.09 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-server.browser.development.js	+0.92%	215.44 kB	217.42 kB	+0.89%	38.86 kB	39.20 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-server.edge.development.js	+0.91%	216.66 kB	218.64 kB	+0.94%	38.81 kB	39.17 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-server.edge.development.js	+0.91%	216.66 kB	218.64 kB	+0.94%	38.81 kB	39.17 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-server.edge.development.js	+0.91%	216.66 kB	218.65 kB	+0.93%	38.81 kB	39.18 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-server.edge.development.js	+0.91%	216.66 kB	218.65 kB	+0.93%	38.81 kB	39.18 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-server.edge.development.js	+0.91%	218.75 kB	220.73 kB	+0.87%	39.25 kB	39.59 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-server.edge.development.js	+0.91%	218.75 kB	220.74 kB	+0.85%	39.26 kB	39.59 kB
oss-stable-semver/react-server-dom-esm/cjs/react-server-dom-esm-server.node.development.js	+0.87%	231.71 kB	233.72 kB	+0.85%	41.88 kB	42.23 kB
oss-stable/react-server-dom-esm/cjs/react-server-dom-esm-server.node.development.js	+0.87%	231.71 kB	233.72 kB	+0.85%	41.88 kB	42.23 kB
oss-experimental/react-server-dom-esm/cjs/react-server-dom-esm-server.node.development.js	+0.86%	233.80 kB	235.81 kB	+0.86%	42.33 kB	42.70 kB
oss-stable-semver/react-server-dom-parcel/cjs/react-server-dom-parcel-server.node.development.js	+0.84%	238.30 kB	240.31 kB	+0.88%	42.46 kB	42.84 kB
oss-stable/react-server-dom-parcel/cjs/react-server-dom-parcel-server.node.development.js	+0.84%	238.30 kB	240.31 kB	+0.88%	42.46 kB	42.84 kB
oss-experimental/react-server-dom-parcel/cjs/react-server-dom-parcel-server.node.development.js	+0.83%	240.39 kB	242.40 kB	+0.91%	42.92 kB	43.31 kB
oss-stable-semver/react-server-dom-unbundled/cjs/react-server-dom-unbundled-server.node.development.js	+0.82%	244.96 kB	246.96 kB	+0.83%	43.54 kB	43.90 kB
oss-stable/react-server-dom-unbundled/cjs/react-server-dom-unbundled-server.node.development.js	+0.82%	244.96 kB	246.96 kB	+0.83%	43.54 kB	43.90 kB
oss-stable-semver/react-server-dom-webpack/cjs/react-server-dom-webpack-server.node.development.js	+0.81%	246.15 kB	248.16 kB	+0.81%	43.87 kB	44.22 kB
oss-stable/react-server-dom-webpack/cjs/react-server-dom-webpack-server.node.development.js	+0.81%	246.15 kB	248.16 kB	+0.81%	43.87 kB	44.22 kB
oss-stable-semver/react-server-dom-turbopack/cjs/react-server-dom-turbopack-server.node.development.js	+0.81%	246.20 kB	248.21 kB	+0.82%	43.86 kB	44.22 kB
oss-stable/react-server-dom-turbopack/cjs/react-server-dom-turbopack-server.node.development.js	+0.81%	246.20 kB	248.21 kB	+0.82%	43.86 kB	44.22 kB
oss-experimental/react-server-dom-unbundled/cjs/react-server-dom-unbundled-server.node.development.js	+0.81%	247.05 kB	249.05 kB	+0.84%	44.01 kB	44.38 kB
oss-experimental/react-server-dom-webpack/cjs/react-server-dom-webpack-server.node.development.js	+0.81%	248.24 kB	250.25 kB	+0.83%	44.33 kB	44.70 kB
oss-experimental/react-server-dom-turbopack/cjs/react-server-dom-turbopack-server.node.development.js	+0.81%	248.29 kB	250.30 kB	+0.83%	44.33 kB	44.70 kB
oss-experimental/react-markup/cjs/react-markup.react-server.development.js	+0.29%	674.33 kB	676.32 kB	+0.27%	119.44 kB	119.76 kB

Generated by 🚫 dangerJS against 4550479